... : 0.6-3.0mm. Gr1 Porosity Sintered Titanium Filter for Medical Use 1. Detailed Information. Item NameTitanium FilterPorosity 28%-50%Aperture4μ-160 ... , 5% hydrochloric acid, molten sodium, hydrogen, nitrogen, hydrogen sulfide, acetylene, water vapor, hydrogen, gas, carbon dioxide gas environment. Filtering level Filtering ...